Radiological dose implications of the natural radioactivity in surface soils in Ekiti State, Nigeria

Abstract

The radiological dose implications of the natural radioactivity in the surface soil across Ekiti State, Nigeria have been determined in this study by using a very sensitive gamma spectroscopic system of measurement. Effective dose at 1.0m above the ground in the State was found to vary between 0.037 and 0.227mSvy-1 while the fifty years integral dose obtained ranged from 1.85 to 11.5mSv with a mean of 5.4770+ 2.926mSv. The estimated average effective dose equivalent for the State is 0.109+ 0.058 mSvy-1. This value is far below the 0.41 mSvy-1 estimated as the world average by UNSCEAR and the dose limit of 1.0 mSv per year recommended as the individual dose limit for members of the public by the International Commission for Radiological Protection (ICRP).


(Global Journal of Pure and Applied Sciences: 2002 8(3): 357-360)